Improvement in pavements



e. c. lf.4 o'TTo.

Payements.

Patented Feb. 3,1874.

N0.147,o16.v

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WITNESSES vUNITED STATES PATENT OEEIOE.

CARL O. F. OTTO, OF SYRACUSE, NEW YORK.

IMPROVEMENT IN PAVEMENTS..

Specification forming part o`f Letters Patent No. 147,016, dated February 3, 1874; application filed May 26, 1873.

To all whom it may concernl Be it known that I, CARL GnRrsTlAN FER- DINAND OTTO, of Syracuse, in the county of Onondaga, in the State of New York, have invented a new and useful Improvement in Wooden Pavements, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact descrip tion.

The object of my invention is to furnish a material for pavements which shall be firm, durable, and transportable; and it consists in a block or slab made of hard-wood blocks, prepared as hereinafter described, set upon end, and cemented together with a compound of asphaltum, clay, and sand. n Inthe drawings, amare thehard-wood blocks; c c, the compound of asphaltum, clay, and sand.

Figure lis atop view of my invention; Fig. 2, a cross-section of the same.

In manufacturing these paving blocks or slabs, the hard-wood blocks a a are first saturated with sulphate of iron and ferrocyanide of potassium, (2KCy,FeCy-{3 aqua,) which process prevents the fermentation ofthe sap, and preserves the wood. They are then kiln-dried, which causes them to crack and form receptaclesfor thecompound of asphaltum,cc. They are then placed in molds, and the heated compound of asphaltum, clay, and sand poured around and between them, cementin g them together, and forming a solid block or slab which is transportable and ready for use in paving.

A pavement constructed of these blocks will be iirm and durable, because the wood will swell and the asphaltum shrink when wet, and vice versa, the wood will shrink and the asphaltum swell when heated or dry.

The compound of asphaltum, clay, and sand is made of about the proportion of one-tenth clay, nine-tenths sand, and two parts asphaltum, varying according` to the quality of the component parts.

I claim- The combination of hard-wood blocks, which have been saturated with sulphate of iron and ferrocyanide of potassium, andkiln-dried, as herein speciiied, with a compound of asphaltum, clay, and sand, for the purpose of forming blocks for paving, substantially as and in the manner set forth.

In testimony whereof I have signed my name and affixed my seal, in the presence of two attesting witnesses, at Syracuse, in the county of Onondaga and State of New York, this 23d day of May, 1873.

CARL CHRIS lIAN FERDINAND OTTO. [L. 5,]

Witnesses:

GEORGE H. BOOTH, WILLIAM B. HUBBARD. 

